Yosh installed..........DRZ-E

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Yosh stainless slip-on for the DRZ-E. So far I'm not that impressed. OK, I've only ridden it down the street. It's first real test will be this weekend.
Initial impressions:
1) LOUD !!
2) softer off the bottom
3) slightly quicker revving
4) slightly more on top
5) sounds mean
6) lighter by about 1.5-2 lbs ??

You, of all people! Screwing up that wonderful and ingenious stock DRZ system with a useless and LOUD aftermarket pipe. I ain't ridin' behind you anymore (which, of course, is my usual position). I wish I could put Yoshimura and Big Gun out of business completely... they've done more damage to our sport than we can calculate.

Bill, You'll love the Yosh. I've had it on my "E" for almost a year. It opened the bike up everywhere, top to bottom. I don't know about the "softer on the bottom" comment. I think you'll change your mind on that one after a good trail ride where you have to lift the front wheel over some obsticles. The added noise is a factor though. From what I can tell of other systems I've heard on other DRZ's the Yosh is one of, if not the, loudest. Thats the only drawback.

biglou

Just put my full system on last night. The diameter looks to be 25-50% larger for the entire length of the pipe from head to can. I didn't think it was any louder than the FMF slip-on, just different. More of a "Thud" than a "Thump" sound. I re-jetted from 165 up to 168 as per the instructions. I thought better of riding it down the street. It was close to 8PM when I finished. First ride this Saturday. Can't wait!

I've got the full Yoshi Ti system and agree with most here on the thread, IT'S TOO DAMN LOUD!!!! I'm thinking of selling it and going back to stock, the power gain wasn't that dramatic, although I did lose 8lbs. Come on Yoshi, you guys can make them quieter. We'll need that if we intend to keep on riding on public lands.

Lou, let me know about the difference in riding. My cousin is buying a DRZE and is curious if the complete system is much different from the slip-on. I know I felt an improvement throughout the power range over stock. I also have the spark arrester core and it made no difference in decibels

I had planned on switching back and forth with stock depending on if I was going to be in sensitive areas, but it took a torch, large vise grips and a hammer to seperate the header from mid section when I had to ship the silencer back to Yosh. I have the stainless steel complete system. I just try and lug it if I am near houses on trail rides or Enduros. I am going to install a 90 degree turn down as soon as I can find some pipe that fits inside the tip. Lou, how is your supension? I have been riding mine with the studded tires and it feels much better over the 70' double, but I am feeling a little deflection in the woods. The temps were in the 20's so I am going to wait for warmer weather to change settings. Tim

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DRZETIM's new name

biglou

Tim-I sprung for the stainless/titanium system since I get a fair price from my local shop. The slip-fit from the header to the tailpipe is sweeet. We went to one of the local tracks Saturday and it was unbelievably muddy. But, I did get to do a nice "Fling the mud off the tires" run (several times) and I have to say that the pull from the bottom end is noticably stronger. There were a couple places on the track where I could feel the difference in the suspension. It seems to launch at a better angle for me and feels a lot more nimble through the whoops. I let Agent Orange do a couple laps with it so I could listen to the engine under load. Loud or not, I gotta say it sounds sweet. As far as that 70' double, well, maybe next week.

Subscriber

Glad you like it, I've got the ss/alum. system on mine, noticed on the first ride the front wheel was lighter, woo hoo, doesn't seem any louder than most of the other "piped" four strokes.
Like firemedic, I just take it easy near other people, though noise isn't such an issue around here.

Mod Ban

You guys talk about the system being louder than stock. I haven't seen an aftermarket exhaust system for any of the recent high-performance four-bangers yet that isn't MUCH louder than stock, especially for YZF/WR 4xx bikes. I ride with two friends, one has a WR 400, one has a YZ 400, both with FMF exhausts, and if I am right with them, I can't even hear my own bike. The aftermarket needs to address this noise issue, and so does Yamaha, their YZF's are way too loud, even stock. Ktm and Suzuki managed to make good exhaust systems for their four-strokes that have reasonable sound levels, and riders everywhere are yanking them off to put on loud aftermarket systems. We recently lost another good riding area near here, the reason? Too many loud bikes bothering the houses that where a couple of miles from the area. Don't get me wrong, this isn't just a four-stroke issue, there are too many loud two-strokes also. We as a group have to take this seriously.